It requires choice because you have to make a choice of what you want to sacrifice to get something you made need.
Another word for currency is cash, money or banknotes
C trees that grow fast. Climax community is the final stage of succession. It needs to be a stable environment with no interruptions. :)
1) Energy consumption: turn off electronics when not needed: turn off the light, turn off the computer while not using it, don't set your screen to maximum brightness when you don't need it.
2) air pollution: limit your waste: segregate trash and recycle.
Answer:
A.
Explanation:
After the Civil War many African American people moved out of the South, and up to the North to make a better life for themselves. This made the population of northern cities to increase dramatically.